78634806 has 16 divisors (see below), whose sum is σ = 165547200. Its totient is φ = 24832008.

The previous prime is 78634763. The next prime is 78634811. The reversal of 78634806 is 60843687.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 344776 + ... + 345003.

It is an arithmetic number, because the mean of its divisors is an integer number (10346700).

Almost surely, 2^78634806 is an apocalyptic number.

78634806 is an abundant number, since it is smaller than the sum of its proper divisors (86912394).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78634806 is a wasteful number, since it uses less digits than its factorization.

78634806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 689803.

The product of its (nonzero) digits is 193536, while the sum is 42.

The square root of 78634806 is about 8867.6268527718. The cubic root of 78634806 is about 428.4218443999.

The spelling of 78634806 in words is "seventy-eight million, six hundred thirty-four thousand, eight hundred six".